#include "u_cpu_detect.h"
#if defined(PIPE_ARCH_PPC)
-#if defined(PIPE_OS_DARWIN)
+#if defined(PIPE_OS_APPLE)
#include <sys/sysctl.h>
#else
#include <signal.h>
#endif
-struct util_cpu_caps util_cpu_caps;
-
-static int has_cpuid(void);
-
-#if defined(PIPE_ARCH_X86)
-
-/* The sigill handlers */
-#if defined(PIPE_OS_LINUX) /*&& defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC)*/
-static void
-sigill_handler_sse(int signal, struct sigcontext sc)
-{
- /* Both the "xorps %%xmm0,%%xmm0" and "divps %xmm0,%%xmm1"
- * instructions are 3 bytes long. We must increment the instruction
- * pointer manually to avoid repeated execution of the offending
- * instruction.
- *
- * If the SIGILL is caused by a divide-by-zero when unmasked
- * exceptions aren't supported, the SIMD FPU status and control
- * word will be restored at the end of the test, so we don't need
- * to worry about doing it here. Besides, we may not be able to...
- */
- sc.eip += 3;
-
- util_cpu_caps.has_sse=0;
-}
+#ifdef DEBUG
+DEBUG_GET_ONCE_BOOL_OPTION(dump_cpu, "GALLIUM_DUMP_CPU", FALSE)
+#endif
-static void
-sigfpe_handler_sse(int signal, struct sigcontext sc)
-{
- if (sc.fpstate->magic != 0xffff) {
- /* Our signal context has the extended FPU state, so reset the
- * divide-by-zero exception mask and clear the divide-by-zero
- * exception bit.
- */
- sc.fpstate->mxcsr |= 0x00000200;
- sc.fpstate->mxcsr &= 0xfffffffb;
- } else {
- /* If we ever get here, we're completely hosed.
- */
- }
-}
-#endif /* PIPE_OS_LINUX && _POSIX_SOURCE && X86_FXSR_MAGIC */
-#if defined(PIPE_OS_WINDOWS)
-static LONG CALLBACK
-win32_sig_handler_sse(EXCEPTION_POINTERS* ep)
-{
- if(ep->ExceptionRecord->ExceptionCode==EXCEPTION_ILLEGAL_INSTRUCTION){
- ep->ContextRecord->Eip +=3;
- util_cpu_caps.has_sse=0;
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- return EXCEPTION_CONTINUE_SEARCH;
-}
-#endif /* PIPE_OS_WINDOWS */
+struct util_cpu_caps util_cpu_caps;
-#endif /* PIPE_ARCH_X86 */
+#if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
+static int has_cpuid(void);
+#endif
-#if defined(PIPE_ARCH_PPC) && !defined(PIPE_OS_DARWIN)
+#if defined(PIPE_ARCH_PPC) && !defined(PIPE_OS_APPLE)
static jmp_buf __lv_powerpc_jmpbuf;
static volatile sig_atomic_t __lv_powerpc_canjump = 0;
static void
check_os_altivec_support(void)
{
-#if defined(PIPE_OS_DARWIN)
+#if defined(PIPE_OS_APPLE)
int sels[2] = {CTL_HW, HW_VECTORUNIT};
int has_vu = 0;
int len = sizeof (has_vu);
util_cpu_caps.has_altivec = 1;
}
}
-#else /* !PIPE_OS_DARWIN */
- /* no Darwin, do it the brute-force way */
+#else /* !PIPE_OS_APPLE */
+ /* not on Apple/Darwin, do it the brute-force way */
/* this is borrowed from the libmpeg2 library */
signal(SIGILL, sigill_handler);
if (setjmp(__lv_powerpc_jmpbuf)) {
signal(SIGILL, SIG_DFL);
util_cpu_caps.has_altivec = 1;
}
-#endif /* PIPE_OS_DARWIN */
+#endif /* !PIPE_OS_APPLE */
}
#endif /* PIPE_ARCH_PPC */
-/* If we're running on a processor that can do SSE, let's see if we
- * are allowed to or not. This will catch 2.4.0 or later kernels that
- * haven't been configured for a Pentium III but are running on one,
- * and RedHat patched 2.2 kernels that have broken exception handling
- * support for user space apps that do SSE.
- */
-#if defined(PIPE_ARCH_X86) || defined (PIPE_ARCH_X86_64)
-static void
-check_os_katmai_support(void)
-{
-#if defined(PIPE_ARCH_X86)
-#if defined(PIPE_OS_FREEBSD)
- int has_sse=0, ret;
- int len = sizeof (has_sse);
-
- ret = sysctlbyname("hw.instruction_sse", &has_sse, &len, NULL, 0);
- if (ret || !has_sse)
- util_cpu_caps.has_sse=0;
-
-#elif defined(PIPE_OS_NETBSD) || defined(PIPE_OS_OPENBSD)
- int has_sse, has_sse2, ret, mib[2];
- int varlen;
-
- mib[0] = CTL_MACHDEP;
- mib[1] = CPU_SSE;
- varlen = sizeof (has_sse);
-
- ret = sysctl(mib, 2, &has_sse, &varlen, NULL, 0);
- if (ret < 0 || !has_sse) {
- util_cpu_caps.has_sse = 0;
- } else {
- util_cpu_caps.has_sse = 1;
- }
-
- mib[1] = CPU_SSE2;
- varlen = sizeof (has_sse2);
- ret = sysctl(mib, 2, &has_sse2, &varlen, NULL, 0);
- if (ret < 0 || !has_sse2) {
- util_cpu_caps.has_sse2 = 0;
- } else {
- util_cpu_caps.has_sse2 = 1;
- }
- util_cpu_caps.has_sse = 0; /* FIXME ?!?!? */
-
-#elif defined(PIPE_OS_WINDOWS)
- LPTOP_LEVEL_EXCEPTION_FILTER exc_fil;
- if (util_cpu_caps.has_sse) {
- exc_fil = SetUnhandledExceptionFilter(win32_sig_handler_sse);
-#if defined(PIPE_CC_GCC)
- __asm __volatile ("xorps %xmm0, %xmm0");
-#elif defined(PIPE_CC_MSVC)
- __asm {
- xorps xmm0, xmm0 /* executing SSE instruction */
- }
-#else
-#error Unsupported compiler
-#endif
- SetUnhandledExceptionFilter(exc_fil);
- }
-#elif defined(PIPE_OS_LINUX)
- struct sigaction saved_sigill;
- struct sigaction saved_sigfpe;
-
- /* Save the original signal handlers.
- */
- sigaction(SIGILL, NULL, &saved_sigill);
- sigaction(SIGFPE, NULL, &saved_sigfpe);
-
- signal(SIGILL, (void (*)(int))sigill_handler_sse);
- signal(SIGFPE, (void (*)(int))sigfpe_handler_sse);
-
- /* Emulate test for OSFXSR in CR4. The OS will set this bit if it
- * supports the extended FPU save and restore required for SSE. If
- * we execute an SSE instruction on a PIII and get a SIGILL, the OS
- * doesn't support Streaming SIMD Exceptions, even if the processor
- * does.
- */
- if (util_cpu_caps.has_sse) {
- __asm __volatile ("xorps %xmm1, %xmm0");
- }
-
- /* Emulate test for OSXMMEXCPT in CR4. The OS will set this bit if
- * it supports unmasked SIMD FPU exceptions. If we unmask the
- * exceptions, do a SIMD divide-by-zero and get a SIGILL, the OS
- * doesn't support unmasked SIMD FPU exceptions. If we get a SIGFPE
- * as expected, we're okay but we need to clean up after it.
- *
- * Are we being too stringent in our requirement that the OS support
- * unmasked exceptions? Certain RedHat 2.2 kernels enable SSE by
- * setting CR4.OSFXSR but don't support unmasked exceptions. Win98
- * doesn't even support them. We at least know the user-space SSE
- * support is good in kernels that do support unmasked exceptions,
- * and therefore to be safe I'm going to leave this test in here.
- */
- if (util_cpu_caps.has_sse) {
- /* test_os_katmai_exception_support(); */
- }
-
- /* Restore the original signal handlers.
- */
- sigaction(SIGILL, &saved_sigill, NULL);
- sigaction(SIGFPE, &saved_sigfpe, NULL);
-
-#else
- /* We can't use POSIX signal handling to test the availability of
- * SSE, so we disable it by default.
- */
- util_cpu_caps.has_sse = 0;
-#endif /* __linux__ */
-#endif
-
-#if defined(PIPE_ARCH_X86_64)
- util_cpu_caps.has_sse = 1;
-#endif
-}
-
+#if defined(PIPE_ARCH_X86) || defined (PIPE_ARCH_X86_64)
static int has_cpuid(void)
{
#if defined(PIPE_ARCH_X86)
memset(&util_cpu_caps, 0, sizeof util_cpu_caps);
- /* Check for arch type */
-#if defined(PIPE_ARCH_MIPS)
- util_cpu_caps.arch = UTIL_CPU_ARCH_MIPS;
-#elif defined(PIPE_ARCH_ALPHA)
- util_cpu_caps.arch = UTIL_CPU_ARCH_ALPHA;
-#elif defined(PIPE_ARCH_SPARC)
- util_cpu_caps.arch = UTIL_CPU_ARCH_SPARC;
-#elif defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
- util_cpu_caps.arch = UTIL_CPU_ARCH_X86;
- util_cpu_caps.little_endian = 1;
-#elif defined(PIPE_ARCH_PPC)
- util_cpu_caps.arch = UTIL_CPU_ARCH_POWERPC;
- util_cpu_caps.little_endian = 0;
-#else
- util_cpu_caps.arch = UTIL_CPU_ARCH_UNKNOWN;
-#endif
-
/* Count the number of CPUs in system */
#if defined(PIPE_OS_WINDOWS)
{
util_cpu_caps.cacheline = regs2[2] & 0xFF;
}
- if (util_cpu_caps.has_sse)
- check_os_katmai_support();
-
if (!util_cpu_caps.has_sse) {
util_cpu_caps.has_sse2 = 0;
util_cpu_caps.has_sse3 = 0;
#endif /* PIPE_ARCH_PPC */
#ifdef DEBUG
- debug_printf("util_cpu_caps.arch = %i\n", util_cpu_caps.arch);
- debug_printf("util_cpu_caps.nr_cpus = %u\n", util_cpu_caps.nr_cpus);
-
- debug_printf("util_cpu_caps.x86_cpu_type = %u\n", util_cpu_caps.x86_cpu_type);
- debug_printf("util_cpu_caps.cacheline = %u\n", util_cpu_caps.cacheline);
-
- debug_printf("util_cpu_caps.has_tsc = %u\n", util_cpu_caps.has_tsc);
- debug_printf("util_cpu_caps.has_mmx = %u\n", util_cpu_caps.has_mmx);
- debug_printf("util_cpu_caps.has_mmx2 = %u\n", util_cpu_caps.has_mmx2);
- debug_printf("util_cpu_caps.has_sse = %u\n", util_cpu_caps.has_sse);
- debug_printf("util_cpu_caps.has_sse2 = %u\n", util_cpu_caps.has_sse2);
- debug_printf("util_cpu_caps.has_sse3 = %u\n", util_cpu_caps.has_sse3);
- debug_printf("util_cpu_caps.has_ssse3 = %u\n", util_cpu_caps.has_ssse3);
- debug_printf("util_cpu_caps.has_sse4_1 = %u\n", util_cpu_caps.has_sse4_1);
- debug_printf("util_cpu_caps.has_3dnow = %u\n", util_cpu_caps.has_3dnow);
- debug_printf("util_cpu_caps.has_3dnow_ext = %u\n", util_cpu_caps.has_3dnow_ext);
- debug_printf("util_cpu_caps.has_altivec = %u\n", util_cpu_caps.has_altivec);
+ if (debug_get_option_dump_cpu()) {
+ debug_printf("util_cpu_caps.nr_cpus = %u\n", util_cpu_caps.nr_cpus);
+
+ debug_printf("util_cpu_caps.x86_cpu_type = %u\n", util_cpu_caps.x86_cpu_type);
+ debug_printf("util_cpu_caps.cacheline = %u\n", util_cpu_caps.cacheline);
+
+ debug_printf("util_cpu_caps.has_tsc = %u\n", util_cpu_caps.has_tsc);
+ debug_printf("util_cpu_caps.has_mmx = %u\n", util_cpu_caps.has_mmx);
+ debug_printf("util_cpu_caps.has_mmx2 = %u\n", util_cpu_caps.has_mmx2);
+ debug_printf("util_cpu_caps.has_sse = %u\n", util_cpu_caps.has_sse);
+ debug_printf("util_cpu_caps.has_sse2 = %u\n", util_cpu_caps.has_sse2);
+ debug_printf("util_cpu_caps.has_sse3 = %u\n", util_cpu_caps.has_sse3);
+ debug_printf("util_cpu_caps.has_ssse3 = %u\n", util_cpu_caps.has_ssse3);
+ debug_printf("util_cpu_caps.has_sse4_1 = %u\n", util_cpu_caps.has_sse4_1);
+ debug_printf("util_cpu_caps.has_3dnow = %u\n", util_cpu_caps.has_3dnow);
+ debug_printf("util_cpu_caps.has_3dnow_ext = %u\n", util_cpu_caps.has_3dnow_ext);
+ debug_printf("util_cpu_caps.has_altivec = %u\n", util_cpu_caps.has_altivec);
+ }
#endif
util_cpu_detect_initialized = TRUE;
projects / mesa.git / blobdiff